Subversion Repositories group.electronics

#include <avr/io.h>

#include <avr/wdt.h>

#include <avr/interrupt.h>

#include <string.h>

#include <util/delay.h>

#include <stdlib.h>

#include "config.h"

#include "avrutil.h"

#include "hc595.h"

#include "twires.h"

#ifndef NULL

#define NULL    ((void *)0)

#endif

void writeSegment(uint8_t digit, uint8_t value);

void pcInterrupt(void);

void receiveEvent(uint8_t bytes);

/* ------------------------------------------------------------------------- */

volatile uint8_t user_debug = 0;

volatile uint8_t tmr0_ovf = 0;

int main(void) {

  /*

  DDR : 1 = Output, 0 = Input

  PORT: 1 = Pullup for Input, otherwise set output

  PIN : Read input pin

	PB0     -

	PB1     - 		- USB D- Low Speed

	PB2     -		- USB D+ 

	PB3     - 		- SDA i2c bb

	PB4	-		- SCL i2c bb

	PB5	-

  */

  DDRB          = 0B00000000;

  PORTB         = 0B00000000;

    systime = 0;

    sysclockInit();

    wdt_enable(WDTO_1S);	// Watchdog for 1 sec

    sei();			// Enable interrupts

    for(;;){

    	 wdt_reset();

    	if (user_debug) {

    	}

    }

    return 0;

}

ISR(TIM0_OVF_vect) {

	tmr0_ovf++;

	// Clk/1 TCCR0B = (1<< CS00);

	//20.0Mhz, 1ms = 78ovf

	//16.5Mhz, 1ms = 64ovf

	//16.0Mhz, 1ms = 62ovf

	//12.0Mhz, 1ms = 46ovf

	// 8.0Mhz, 1ms = 31ovf

	// 8.0Mhz, .5ms = 15ovf, 160r

	if (tmr0_ovf>=64) {

			systime++;

			tmr0_ovf = 0;

	}

}